setting up a wifi extender with my vodafone station

I want to set up a wifi extender and on the instruction sheet it says to push the WPS button on the router. As the station does not have one I assumed that the WPS pairing would operate the same function but I can not activate the WPS pairing button on the modem.

Re: setting up a wifi extender with my vodafone station

Thanks Hamish. How do I set the password as security ? the extender is listed as a separate network but if I pair the WPS on the router with the extender ,will it become part of my original network and take on the same password?